Content-Type: text/html; charset=UTF-8 Double Star Calculator - Orbital Elements

Double Star Calculator - Orbit

- Revision:		$Rev: 1216 $
- Report created:		2025-07-11 19:42:04

Orbital Elements for BU1266AB

WDS:	BU1266AB	WDS ID/Discoverer
P:	48.400	Orbital period (years)
a:	0.189	Semi-major axis (arcseconds)
i:	142.0	Inclination (degrees)
Ω:	249.0	Longitude of ascending node (degrees)
T:	1910.000	Epoch of periastron passage (year)
e:	0.43	Eccentricity
ω:	335.0	Longitude of periastron (degrees)
Start-Year:	2001.0	Year
End-Year:	2049.0	Year
Epoch:	2025.0	Besselian Epoch

Further data from the WDS Sixth Catalog of Orbits for BU1266AB

Position:	233026.29+304954.6	Epoch-2000 right ascension and declination
WDS-ID:	23304+3050	WDS designation
Discoverer Code:	BU1266AB	Discover designation and components
ADS number:	16800	Aitken Double Star catalog
HD number:	221264	HD catalog number
Hipparcos number:	116017	Hipparcos catalog number
V1:	8.35	Magnitude of the primary
V2:	8.14	Magnitude of the secondary
Equinox:	2000	Equinox
Date:	1996	Date of last observation
Orbit grade:	2	Orbit grade, ranging from 1 'definitive' to 5 'indeterminate'
Flags:	n	Flags

Double Star Orbit for BU1266AB

WDS 6th Orbit including measures of BU1266AB

Image from the USNO WDS 6th Orbit Catalog (see Acknowledgements)

Ephemeris of BU1266AB

Click to expand/collapse ephemeris:

Year       Sep[“]   PA[°]
---------------------------------------------
2025.0     0.232    107.5
-------------------------
2001.0     0.130     10.9
2002.0     0.116    358.3
2003.0     0.105    342.6
2004.0     0.098    323.9
2005.0     0.096    303.6
2006.0     0.100    283.8
2007.0     0.105    265.7
2008.0     0.111    249.5
2009.0     0.115    234.7
2010.0     0.118    220.8
2011.0     0.122    207.7
2012.0     0.126    195.3
2013.0     0.131    183.8
2014.0     0.137    173.2
2015.0     0.144    163.6
2016.0     0.152    155.0
2017.0     0.161    147.3
2018.0     0.171    140.4
2019.0     0.180    134.3
2020.0     0.190    128.8
2021.0     0.199    123.8
2022.0     0.208    119.2
2023.0     0.217    115.0
2024.0     0.225    111.2
2025.0     0.232    107.5
2026.0     0.239    104.1
2027.0     0.245    100.9
2028.0     0.250     97.8
2029.0     0.255     94.9
2030.0     0.258     92.0
2031.0     0.261     89.2
2032.0     0.263     86.4
2033.0     0.264     83.7
2034.0     0.264     81.0
2035.0     0.263     78.3
2036.0     0.261     75.5
2037.0     0.258     72.7
2038.0     0.254     69.8
2039.0     0.249     66.8
2040.0     0.242     63.7
2041.0     0.235     60.4
2042.0     0.226     56.8
2043.0     0.216     52.9
2044.0     0.205     48.7
2045.0     0.193     43.9
2046.0     0.180     38.5
2047.0     0.165     32.1
2048.0     0.150     24.5

Disclaimer

Acknowledgements

The Double Star Calculator - Orbital Elements makes use of the Washington Double Star Sixth Catalog of Orbits of Visual Binary Stars, maintained at the U.S. Naval Observatory.